AC Doctor INC New 9 Cell 7800mAh Black Laptop Battery Replacement for ACER ASPIRE ONE ZG5 UM08A31 UM08A51 UM08A71 UM08A72 UM08A73 US Specification: 9 cells black li-ion 11.1V 7800mAh black 203.0x53.0x30.7mm 436.0g replacement laptop battery for Acer UM08A31 10.1 8.9 inch Aspire One ZG5 A110 A150 D150 D250 531h 571. Full compatible with your original battery, brand new direct from Professional Manufacturer. 10.8V and 11.1V is compatible. CE UL RoHS certified, safe use.60 days no worry to return or exchange item, 12 months customer service warranty Please make sure that the battery part numbers listed in the description matches the battery part number on your original battery before you purchase.